I've got a 8 qt Moroso pan from the 70's and it does hang low but no lower than my headers. Fortunately my car sits high as as was the style in the late sixties and seventies.
If you have concerns, you may want to go to a Tee pan.
Within a couple of months of getting my brand new '64 Custom/427, I was told by DST guys that I needed a pan that would hold a couple of extra quarts. I went to the bone yard and bought an FE pan. I cut the sump off of it straightened out the edges on the cut, and welded the extra sump to my factory pan. I cut a hole large enough to be able to put the pick-up through, and added a piece of electrical thin-wall in the center of the pick-up tube as an extension.
The pan was then, for all practical purposes, two sumps deep, but I was also, using the then-best-thinking, running spring jacks in the front coils, so the pan was probably three inches further toward the ground at rest. I never had a problem with ground-contact, but the raised front end made the handling very light when, with a 3.50 gear, I got up above 130 MPH or so out on the interstate, On the other hand, third gear in the Top-Loader was good to about 125 and made an EXCELLENT passing gear when some pesky 409 thought he wanted to play.

KS